The Activate System followed by Reveal mission, does this have to be played in that order?

No. During every one of your turns in the command phase, you can reveal a mission, activate a system, or pass. The rebel player may voluntarily reveal the hidden base on their turn before doing one of these things. Once you pass, you get no more turns.

There times when it could be useful, such as if you plan on moving anyway, and the Death Star is camped in the system without ground forces; revealing the base would let you put your stuff all there to surprise attack the Death Star.

There times when it could be useful, such as if you plan on moving anyway, and the Death Star is camped in the system without ground forces; revealing the base would let you put your stuff all there to surprise attack the Death Star.

But the OP should be aware that it's a very edge case. I've played about 30 or 40 times now, and neither of us have ever voluntarily revealed our base.

There times when it could be useful, such as if you plan on moving anyway, and the Death Star is camped in the system without ground forces; revealing the base would let you put your stuff all there to surprise attack the Death Star.

But the OP should be aware that it's a very edge case. I've played about 30 or 40 times now, and neither of us have ever voluntarily revealed our base.

There times when it could be useful, such as if you plan on moving anyway, and the Death Star is camped in the system without ground forces; revealing the base would let you put your stuff all there to surprise attack the Death Star.

But the OP should be aware that it's a very edge case. I've played about 30 or 40 times now, and neither of us have ever voluntarily revealed our base.